configs/stm32f469_disco: add host {dosfs, m}tools
Commit 04a0094f0ef077 (configs/stm32f469_disco: fix kernel bootup) changed
the defconfig to build a vfat image, but forgot to add dosfstools/mtools
host utilities needed for this.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 6dd9e246a7b497819fd34595835d61c635d993f6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>